A photorealistic cinematic reimagining inspired by Demon Slayer. The main hero is a realistic marmot warrior portraying Tanjiro — small yet brave, with soft brown fur, expressive eyes, and a determined look. He wears a dark-green checkered haori and carries a katana that glows faintly through the morning mist. Beside him stands a bear resembling Nezuko, wearing a tattered kimono, eyes glowing gently with inner strength. Facing them in the distance is a chubby Asian man depicted as a demon, his face half-lit by red and blue light, his expression filled with rage and sorrow. The setting is a mist-covered Japanese mountain forest at dawn, with drifting embers, falling leaves, and cinematic lighting that captures motion and emotion. Hyper-realistic fur, detailed fabrics, cinematic depth of field, dramatic composition, warm and cold light contrast, subtle motion blur, film grain. In the bottom right corner, the title “Demon Slayer: Marmot no Yaiba” written in bold red brushstroke-style English letters resembling traditional Japanese calligraphy.